Electric plug



S. T. EZZO ELECTRIC PLUG Aug. 4, 1936.

Filed July 12, 1935 2 Sheets-Sheet l S. T. EZZO ELECTRIC PLUG Aug. 4, 1936.

Filed July 12, 1935 2 Sheets-Sheet 2 gara es a a we rare 2 Gllaims.

This invention relates to an electric plug, the

so that there is no danger of the plugs becoming separated until manually pulled apart.

This invention also consists in certain other features of construction and in the combination and arrangement of several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:--

Figure 1 is an elevation of the improved plug.

Figure 2 is an end view looking toward the i small end of the prong carrying section.

Figure 3 is a section on the line 3-3 of Figure 2 but showing the front section connected with the prong carrying section.

Figure 4 is a side view of the prong carrying section.

Figure 5 is an end view looking toward the outer end of the front section.

Figure 6 is an end view looking toward the pronged end of the prong carrying section.

Figure '7 is a view looking toward the inner end of the front section.

Figure 8 is a view of one of the prongs. In these drawings, the letter A indicates the prong carrying section and the letter B the front or other section, each section being preferably of the shape shown and both sections are formed of suitable nonconducting material. The section B is formed with an internally threaded flange I for receiving the exteriorly threaded reduced part 2 of the section A so that the two sections are detachably connected together. The section B is formed with a circularlongitudinal extending hole 3 which is of considerable diameter and extends from one end through the other end.

Section A is hollow with its large end closed as at 4 and a partition member 5 divides the space formed by the hollow section into two chambers. This partition has one closure 4 and its other end is enlarged to provide a part 6 of circular shape in cross section and of the same lengthen the hole 3 in the section B,

the parts being so arranged that when the two sections are connected together the part 5 will end connected to thefill the hole in the section B. A prong l passes and through each chamber of the section A through a hole formed in the part A, the outer end of the prong being corrugated as shown at t with the corrugations of substantially V-shape. 5 The inner end of each prong is rounded as shown at 9 and has a transverse hole ill therein and a threaded hole extending inwardly fromthe end. and intersecting the hole it, the end hole being adapted to receive a screw H which acts to hold 10 the stripped end of a conductor H2 in the hole It. These conductors pass through holes iii in the part 6. The part of each prong which passes through a chamber is straight as shown at 'l' and the chambers are filled with suitable non-conducting material which terminates short of the flange 2 as shown in Figure 3.

After the prongs are put in place and the filling material has been put in place it will be seen that the parts 9 carrying the holes in and. 20 the holes for the screws ii are exposed in the space left by the filling material it stopping short of the flange 2 so that the conductors l2 after being pushed through the holes in the part 6 can be readily connected with the parts 9 of the 25 prongs and then the section B is slipped over the part 6 and threaded to the flange 2. Thus it ,wlll be seen that the conductors and the prongs are thoroughly insulated from each other so that there is no danger of the parts within the plug 30 being short-circuited and due to the corrugated outer portions of the prongs they will make firm contact with the walls of the openings in the female plug and thus there is no danger of the accidentally separated and one plug to two plugs becoming it will take a considerable pull on separate it from the other plug.

It is thought from the foregoing description that the advantages and novel features of the 40 invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the 45 appended claims.

What is claimed is:-

1. A plug of the class described comprising a section of non-conducting material, prongs carried by said section and extending from one end 50 thereof, the other end of the section having a space therein into which the inner ends of said prongs extend, a solid partition forming part of the section and dividing said space into two parts, said partition also separating the inner ends of 55 the prongs, an enlargement of circular shape in cross section connected with the outer end of the partition, the inner end of the enlargement being flush with the adjacent end of the section, and said enlargement having separated longitudinally extending bores therein, conductors passing through said bores into the spaces formed by the partition, means for detachably connecting'the inner ends of the conductors to the inner ends of the prongs, and a second section of nonconducting material having a longitudinally extending opening therein for receiving the enlargement, and a flange on the inner end of said second section threaded to the inner end of the first section.

2. A plug of the class described comprising a hollow section of non-conducting material having one end closed and its other end open, a threaded flange formed on the open end, a solid partition dividing the section into two chambers, said partition extending from the closed end to a point flush with the end of the flange, a prong passing through each chamber, with portions of the prong projecting from the closed end of the section, filling material in each chamber and extending to a point at the junction of the flange with the section, whereby a space is formed at the flanged end of the section, which is divided into two parts by the partition, the inner ends of the prongs extending into said two parts of said space, an enlargement formed on that end of the partition which divides said space, said enlargement being of circular shape in cross section and of elongated form and having its inner end flush with the end of the flange, said enlargement being provided with a pair of longitudinally extending bores, each of which opens out into the space, one at each side of the partition, conductors passing through said bores, means for detachably connecting the inner ends of the conductors to the ends of the prongs located in the two parts of the space, a second section of non-conducting material having a longitudinally extending opening therein for receiving the enlargement and having a flange extending from its inner end which is threaded 20 to the flange of the first section, the inner end of the second section abutting the end of the flange of the first section when the two flanges are threaded together.

SAMUEL THOMAS EZZO. 

